<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        let uname = prompt('请输入您的姓名：')
        let age = prompt('请输入您的年龄：')
        //如果打印的字符串内要加变量，必须用``，变量要用${}
        document.write(`${uname}今年${age}岁了`)
    </script>
</body>
</html>